1/*
2 * Copyright (C) 2005 Junio C Hamano
3 */
4#include "cache.h"
5#include "commit.h"
6#include "fetch.h"
7static int use_link;
9static int use_symlink;
10static int use_filecopy = 1;
11static int commits_on_stdin;
12static const char *path; /* "Remote" git repository */
14void prefetch(unsigned char *sha1)
16{
17}
18static struct packed_git *packs;
20static void setup_index(unsigned char *sha1)
22{
23 struct packed_git *new_pack;
24 char filename[PATH_MAX];
25 strcpy(filename, path);
26 strcat(filename, "/objects/pack/pack-");
27 strcat(filename, sha1_to_hex(sha1));
28 strcat(filename, ".idx");
29 new_pack = parse_pack_index_file(sha1, filename);
30 new_pack->next = packs;
31 packs = new_pack;
32}
33static int setup_indices(void)
35{
36 DIR *dir;
37 struct dirent *de;
38 char filename[PATH_MAX];
39 unsigned char sha1[20];
40 sprintf(filename, "%s/objects/pack/", path);
41 dir = opendir(filename);
42 if (!dir)
43 return -1;
44 while ((de = readdir(dir)) != NULL) {
45 int namelen = strlen(de->d_name);
46 if (namelen != 50 ||
47 !has_extension(de->d_name, ".pack"))
48 continue;
49 get_sha1_hex(de->d_name + 5, sha1);
50 setup_index(sha1);
51 }
52 closedir(dir);
53 return 0;
54}
55static int copy_file(const char *source, char *dest, const char *hex,
57 int warn_if_not_exists)
58{
59 safe_create_leading_directories(dest);
60 if (use_link) {
61 if (!link(source, dest)) {
62 pull_say("link %s\n", hex);
63 return 0;
64 }
65 /* If we got ENOENT there is no point continuing. */
66 if (errno == ENOENT) {
67 if (!warn_if_not_exists)
68 return -1;
69 return error("does not exist %s", source);
70 }
71 }
72 if (use_symlink) {
73 struct stat st;
74 if (stat(source, &st)) {
75 if (!warn_if_not_exists && errno == ENOENT)
76 return -1;
77 return error("cannot stat %s: %s", source,
78 strerror(errno));
79 }
80 if (!symlink(source, dest)) {
81 pull_say("symlink %s\n", hex);
82 return 0;
83 }
84 }
85 if (use_filecopy) {
86 int ifd, ofd, status = 0;
87 ifd = open(source, O_RDONLY);
89 if (ifd < 0) {
90 if (!warn_if_not_exists && errno == ENOENT)
91 return -1;
92 return error("cannot open %s", source);
93 }
94 ofd = open(dest, O_WRONLY | O_CREAT | O_EXCL, 0666);
95 if (ofd < 0) {
96 close(ifd);
97 return error("cannot open %s", dest);
98 }
99 status = copy_fd(ifd, ofd);
100 close(ofd);
101 if (status)
102 return error("cannot write %s", dest);
103 pull_say("copy %s\n", hex);
104 return 0;
105 }
106 return error("failed to copy %s with given copy methods.", hex);
107}
108static int fetch_pack(const unsigned char *sha1)
110{
111 struct packed_git *target;
112 char filename[PATH_MAX];
113 if (setup_indices())
114 return -1;
115 target = find_sha1_pack(sha1, packs);
116 if (!target)
117 return error("Couldn't find %s: not separate or in any pack",
118 sha1_to_hex(sha1));
119 if (get_verbosely) {
120 fprintf(stderr, "Getting pack %s\n",
121 sha1_to_hex(target->sha1));
122 fprintf(stderr, " which contains %s\n",
123 sha1_to_hex(sha1));
124 }
125 sprintf(filename, "%s/objects/pack/pack-%s.pack",
126 path, sha1_to_hex(target->sha1));
127 copy_file(filename, sha1_pack_name(target->sha1),
128 sha1_to_hex(target->sha1), 1);
129 sprintf(filename, "%s/objects/pack/pack-%s.idx",
130 path, sha1_to_hex(target->sha1));
131 copy_file(filename, sha1_pack_index_name(target->sha1),
132 sha1_to_hex(target->sha1), 1);
133 install_packed_git(target);
134 return 0;
135}
136static int fetch_file(const unsigned char *sha1)
138{
139 static int object_name_start = -1;
140 static char filename[PATH_MAX];
141 char *hex = sha1_to_hex(sha1);
142 char *dest_filename = sha1_file_name(sha1);
143 if (object_name_start < 0) {
145 strcpy(filename, path); /* e.g. git.git */
146 strcat(filename, "/objects/");
147 object_name_start = strlen(filename);
148 }
149 filename[object_name_start+0] = hex[0];
150 filename[object_name_start+1] = hex[1];
151 filename[object_name_start+2] = '/';
152 strcpy(filename + object_name_start + 3, hex + 2);
153 return copy_file(filename, dest_filename, hex, 0);
154}
155int fetch(unsigned char *sha1)
157{
158 if (has_sha1_file(sha1))
159 return 0;
160 else
161 return fetch_file(sha1) && fetch_pack(sha1);
162}
163int fetch_ref(char *ref, unsigned char *sha1)
165{
166 static int ref_name_start = -1;
167 static char filename[PATH_MAX];
168 static char hex[41];
169 int ifd;
170 if (ref_name_start < 0) {
172 sprintf(filename, "%s/refs/", path);
173 ref_name_start = strlen(filename);
174 }
175 strcpy(filename + ref_name_start, ref);
176 ifd = open(filename, O_RDONLY);
177 if (ifd < 0) {
178 close(ifd);
179 return error("cannot open %s", filename);
180 }
181 if (read_in_full(ifd, hex, 40) != 40 || get_sha1_hex(hex, sha1)) {
182 close(ifd);
183 return error("cannot read from %s", filename);
184 }
185 close(ifd);
186 pull_say("ref %s\n", sha1_to_hex(sha1));
187 return 0;
188}
189static const char local_pull_usage[] =
191"git-local-fetch [-c] [-t] [-a] [-v] [-w filename] [--recover] [-l] [-s] [-n] [--stdin] commit-id path";
192/*
194 * By default we only use file copy.
195 * If -l is specified, a hard link is attempted.
196 * If -s is specified, then a symlink is attempted.
197 * If -n is _not_ specified, then a regular file-to-file copy is done.
198 */
199int main(int argc, const char **argv)
200{
201 int commits;
202 const char **write_ref = NULL;
203 char **commit_id;
204 int arg = 1;
205 setup_git_directory();
207 git_config(git_default_config);
208 while (arg < argc && argv[arg][0] == '-') {
210 if (argv[arg][1] == 't')
211 get_tree = 1;
212 else if (argv[arg][1] == 'c')
213 get_history = 1;
214 else if (argv[arg][1] == 'a') {
215 get_all = 1;
216 get_tree = 1;
217 get_history = 1;
218 }
219 else if (argv[arg][1] == 'l')
220 use_link = 1;
221 else if (argv[arg][1] == 's')
222 use_symlink = 1;
223 else if (argv[arg][1] == 'n')
224 use_filecopy = 0;
225 else if (argv[arg][1] == 'v')
226 get_verbosely = 1;
227 else if (argv[arg][1] == 'w')
228 write_ref = &argv[++arg];
229 else if (!strcmp(argv[arg], "--recover"))
230 get_recover = 1;
231 else if (!strcmp(argv[arg], "--stdin"))
232 commits_on_stdin = 1;
233 else
234 usage(local_pull_usage);
235 arg++;
236 }
237 if (argc < arg + 2 - commits_on_stdin)
238 usage(local_pull_usage);
239 if (commits_on_stdin) {
240 commits = pull_targets_stdin(&commit_id, &write_ref);
241 } else {
242 commit_id = (char **) &argv[arg++];
243 commits = 1;
244 }
245 path = argv[arg];
246 if (pull(commits, commit_id, write_ref, path))
248 return 1;
249 if (commits_on_stdin)
251 pull_targets_free(commits, commit_id, write_ref);
252 return 0;
254}